Ghost cancellation system using wavelet processed ghost...

Details Ghost cancellation system using wavelet processed ghost... Ghost cancellation system using wavelet processed ghost...

2007-12-04

2007-12-04

Hsia, Sherrie (Department: 2622)

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

C348S611000

Reexamination Certificate

active

11005772

ABSTRACT:
Disclosed is a ghost cancellation system based on an enhanced ghost cancellation reference signal for noisy environments. The received analog television signal is first subjected to a digitization step for processing in the digital domain. A wavelet de-noising operation is applied on the reference signal to remove undesired noises before a communication channel is estimated, and filter coefficients are optimally determined. The digitized composite signals are then ghost-reduced by IIR and FIR filters. The power consumption and training time of the realized chip are decreased, which is ideal for mobile and platform applications.

REFERENCES:
patent: 4947252 (1990-08-01), Kobayashi et al.
patent: 5121211 (1992-06-01), Koo
patent: 5196936 (1993-03-01), Kobayashi et al.
patent: 6952238 (2005-10-01), Koo
patent: 7180552 (2007-02-01), Kim

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